package com.sky.service.impl;

import com.fasterxml.jackson.databind.annotation.JsonAppend;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
@Slf4j
@Service
public class SetmealServiceImpl implements SetmealService {

@Autowired
private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;



/**
 * 根据id查询菜品选项
 */
    @Override
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemSetmealId(id);
    }
/**
 * 新增套餐，同时需要保存套餐和菜品的关联关系
 */
@Transactional
    @Override
    public void saveWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //像套餐表插入数据
        setmealMapper.insert(setmeal);
        //获取插入套餐的id
        Long setmealId = setmeal.getId();
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        //保存套餐和菜品的关联关系
        setmealDishMapper.insertBatch(setmealDishes);
    }
/**
 * 套餐分页查询
 */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        int pageNum=setmealPageQueryDTO.getPage();
        int pageSize=setmealPageQueryDTO.getPageSize();
        PageHelper.startPage(pageNum,pageSize);
        Page<SetmealVO> page=setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }
    @Transactional
    @Override
    public void delete(List<Long> ids) {
        ids.forEach(id->{
           Setmeal setmeal= setmealMapper.getById(id);
          if (StatusConstant.ENABLE==setmeal.getStatus()){
              throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
          }
        });
        ids.forEach(setmealId -> {
            //删除套餐表中的数据
            setmealMapper.deleteById(setmealId);
            //删除套餐和菜品的关联数据
            setmealDishMapper.deleteBySetmealId(setmealId);
        });

    }

    /**
     * 根据id查询套餐和套餐菜品关系
     * @param id
     * @return
     */

    @Override
    public SetmealVO getByIdWithDish(Long id) {
        Setmeal setmeal=setmealDishMapper.getById(id);
       List <SetmealDish> setmealDishes=setmealDishMapper.getBySetmealId(id);
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    /**
     * 修改套餐
     * @param setmealDTO
     */
    @Transactional
    @Override
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //修改套餐表
        setmealMapper.update(setmeal);
        //套餐id
        Long setmealId = setmeal.getId();
        //2.删除套餐和菜品的关联关系，操作setmeal_dish表，执行delete
        setmealDishMapper.deleteBySetmealId(setmealId);
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        //3、重新插入套餐和菜品的关联关系，操作setmeal_dish表，执行insert
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 套餐起售，停售
     * @param status
     * @param id
     */

    @Override
    public void startOrStop(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
    if(status== StatusConstant.ENABLE){
        //select a.* from dish a left join setmeal_dish b on a.id = b.dish_id where b.setmeal_id = ?
       List<Dish> dishList= dishMapper.getBySetmealId(id);
        if(dishList != null && dishList.size() > 0){
            dishList.forEach(dish -> {
                if(StatusConstant.DISABLE == dish.getStatus()){
                    throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                }
            });
        }
    }
    Setmeal setmeal = Setmeal.builder()
            .id(id)
            .status(status)
            .build();
            setmealMapper.update(setmeal);
    }
    /**
     * 条件查询
     */
    @Override
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list=setmealMapper.list(setmeal);
        return list;
    }

    }


